Lewistown weather by month

Check out Lewistown weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Lewistown (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
30°F maximum daytime temperature in January in Lewistown30
36°F maximum daytime temperature in February in Lewistown36
41°F maximum daytime temperature in March in Lewistown41
54°F maximum daytime temperature in April in Lewistown54
63°F maximum daytime temperature in May in Lewistown63
72°F maximum daytime temperature in June in Lewistown72
81°F maximum daytime temperature in July in Lewistown81
81°F maximum daytime temperature in August in Lewistown81
68°F maximum daytime temperature in September in Lewistown68
59°F maximum daytime temperature in October in Lewistown59
43°F maximum daytime temperature in November in Lewistown43
32°F maximum daytime temperature in December in Lewistown32
Min temperature (night-time)
9°F minimum night-time temperature in January in Lewistown9
14°F minimum night-time temperature in February in Lewistown14
19°F minimum night-time temperature in March in Lewistown19
28°F minimum night-time temperature in April in Lewistown28
37°F minimum night-time temperature in May in Lewistown37
45°F minimum night-time temperature in June in Lewistown45
50°F minimum night-time temperature in July in Lewistown50
50°F minimum night-time temperature in August in Lewistown50
41°F minimum night-time temperature in September in Lewistown41
32°F minimum night-time temperature in October in Lewistown32
19°F minimum night-time temperature in November in Lewistown19
10°F minimum night-time temperature in December in Lewistown10
Heat & Humidity
No heat & humidity in January in Lewistown0
No heat & humidity in February in Lewistown0
No heat & humidity in March in Lewistown0
No heat & humidity in April in Lewistown0
No heat & humidity in May in Lewistown0
No heat & humidity in June in Lewistown0
Low heat & humidity in July in LewistownL
Low heat & humidity in August in LewistownL
No heat & humidity in September in Lewistown0
No heat & humidity in October in Lewistown0
No heat & humidity in November in Lewistown0
No heat & humidity in December in Lewistown0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Lewistown

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Lewistown9
10 hours of daylight per day in February in Lewistown10
12 hours of daylight per day in March in Lewistown12
14 hours of daylight per day in April in Lewistown14
15 hours of daylight per day in May in Lewistown15
16 hours of daylight per day in June in Lewistown16
15 hours of daylight per day in July in Lewistown15
14 hours of daylight per day in August in Lewistown14
13 hours of daylight per day in September in Lewistown13
11 hours of daylight per day in October in Lewistown11
9 hours of daylight per day in November in Lewistown9
9 hours of daylight per day in December in Lewistown9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Lewistown1
UV (maximum) index 2 (Low) in February in Lewistown2
UV (maximum) index 3 (Moderate) in March in Lewistown3
UV (maximum) index 5 (Moderate) in April in Lewistown5
UV (maximum) index 7 (High) in May in Lewistown7
UV (maximum) index 8 (Very High) in June in Lewistown8
UV (maximum) index 8 (Very High) in July in Lewistown8
UV (maximum) index 7 (High) in August in Lewistown7
UV (maximum) index 5 (Moderate) in September in Lewistown5
UV (maximum) index 3 (Moderate) in October in Lewistown3
UV (maximum) index 1 (Low) in November in Lewistown1
UV (maximum) index 1 (Low) in December in Lewistown1

Rainfall in Lewistown

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
8 days with some rainfall in January in Lewistown8
7 days with some rainfall in February in Lewistown7
8 days with some rainfall in March in Lewistown8
9 days with some rainfall in April in Lewistown9
11 days with some rainfall in May in Lewistown11
10 days with some rainfall in June in Lewistown10
7 days with some rainfall in July in Lewistown7
7 days with some rainfall in August in Lewistown7
7 days with some rainfall in September in Lewistown7
5 days with some rainfall in October in Lewistown5
6 days with some rainfall in November in Lewistown6
7 days with some rainfall in December in Lewistown7
Average monthly rainfall (inches)
0.8 inches monthly rainfall in January in Lewistown0.8
0.6 inches monthly rainfall in February in Lewistown0.6
0.9 inches monthly rainfall in March in Lewistown0.9
1.2 inches monthly rainfall in April in Lewistown1.2
3.2 inches monthly rainfall in May in Lewistown3.2
3.1 inches monthly rainfall in June in Lewistown3.1
1.7 inches monthly rainfall in July in Lewistown1.7
1.8 inches monthly rainfall in August in Lewistown1.8
1.5 inches monthly rainfall in September in Lewistown1.5
1.0 inches monthly rainfall in October in Lewistown1.0
0.7 inches monthly rainfall in November in Lewistown0.7
0.7 inches monthly rainfall in December in Lewistown0.7

More about Lewistown

Lewistown by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Montana (Lewistown) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Lewistown?

Lewistown has a cold climate with warm summers and some rainfall in all months.

Metric (°C)  |  Imperial (°F)

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More about the USA

Compare Lewistown with the USA

Below the Lewistown chart shows average maximum daytime temperature for Lewistown, Montana, USA and the USA (Washington).

Maximum daytime temperature (°F)

Lewistown, Montana, USA
USA (Washington)
41
36
45
41
55
54
66
63
75
72
84
81
88
81
86
68
79
59
68
43
57
32
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
30

Metric (°C)  |  Imperial (°F)

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